Israel confirmed Monday that it assassinated Hamas leader Ismail Haniyeh and issued a stark warning to the leadership of Yemen’s Houthi group, threatening similar action.

Israeli Defence Minister Israel Katz admitted on Monday for the first time publicly that Israel killed Hamas leader Ismail Haniyeh in Iran in July, further risking tensions between Tehran and arch-enemy Israel in a region shaken by the war in Gaza and the conflict in Lebanon.

Israel’s defense minister has confirmed that Israel assassinated Hamas’ top leader last summer and is planning to take similar action against the leadership of the Houthi rebel group in Yemen.